[QuadList] Mark X on Ebay

[Don Norwood]

Some additional Mark Ten trivia.............

In addition to the variations that Chris describes, there were different tip widths too!  All of the possible combinations of bearing type, preamp, and tip width as well as new or rebuilt, were indicated by unique dash numbers, so there were a lot of them and some were 3 digits!  The base number is 1800705 and that was generally all that was on the name plate.  The dash number appeared on the case label along with the serial number.  If the head in question is a rebuilt 10 mil, air bearing, nuvistor, then it is a -049.  When new it would have been -04. 

Dash numbers up through -199 were all 5 and 10 mil heads.  Dash numbers starting at -200 were 15 mil heads.  In 1983, prices for new ball bearing heads were $3,750 while air bearing versions were $5,050, all regardless of preamp type. 

Don Norwood
Digitrak Communications, Inc.
www.digitrakcom.com  
  ----- Original Message ----- 
  From: Chill315 at aol.com 


  The Mark X was a family of heads.  There were air and ball bearing versions.  The head was used on three different types of machines.  The VR-2000 was the first, then the VR-1200 and VR-1100 also used it.  The pre-amp module was different for each series of machines.  The 2000 got the Nuvistor pre-amp.  The VR-1200 got the transistor pre-amp and the VR-1100 had a non pre-amp that used a trim module.  So it was the same head, just a different module.

  Chris Hill

  In a message dated 12/7/2011 10:47:26 P.M. Eastern Standard Time, john at jmit.com.au writes:
    I used a version of the Mk X on a VR1100 with ball bearings instead of air - was this a separate mark no. we also used Mk III and IV on this machine as well - hard to remember circa 1975-76.



----------------------------------------------------------------------------
    From: quadlist-bounces at quadvideotapegroup.com [mailto:quadlist-bounces at quadvideotapegroup.com] On Behalf Of C. Park Seward
    Sent: Thursday, 8 December 2011 10:18
    To: Quad List
    Subject: Re: [QuadList] Mark X on Ebay


    And the big question... What condition are the heads???


    Best,
    Park


    Sent from my iPhone 
    818-535-2747 cell
    (541) 476-6657 hm 
    2" and 1" video transfers

    On Dec 7, 2011, at 1:33 PM, Chill315 at aol.com wrote:


      There is a Mark X with the nuvistor pre-amp available on eBay.  

      Chris Hill
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